/**
 * Copyright (c) 2006-2012, JGraph Ltd
 */
/**
 * Constructs a new graph editor
 */
const Menus = function (editorUi) {
  this.editorUi = editorUi;
  this.menus = {};
  this.init();

  // Pre-fetches checkmark image
  if (!mxClient.IS_SVG) {
    new Image().src = this.checkmarkImage;
  }
};

/**
 * Sets the default font family.
 */
Menus.prototype.defaultFont = 'Helvetica';

/**
 * Sets the default font size.
 */
Menus.prototype.defaultFontSize = '12';

/**
 * Sets the default font size.
 */
Menus.prototype.defaultMenuItems = ['file', 'edit', 'view', 'arrange', 'extras', 'help'];

/**
 * Adds the label menu items to the given menu and parent.
 */
Menus.prototype.defaultFonts = ['Helvetica', 'Verdana', 'Times New Roman', 'Garamond', 'Comic Sans MS',
           		             'Courier New', 'Georgia', 'Lucida Console', 'Tahoma'];

/**
 * Adds the label menu items to the given menu and parent.
 */
Menus.prototype.init = function () {
  var graph = this.editorUi.editor.graph;
  var isGraphEnabled = mxUtils.bind(graph, graph.isEnabled);

  this.customFonts = [];
  this.customFontSizes = [];

  this.put('fontFamily', new Menu(mxUtils.bind(this, function (menu, parent) {
    var addItem = mxUtils.bind(this, function (fontname) {
      var tr = this.styleChange(menu, fontname, [mxConstants.STYLE_FONTFAMILY], [fontname], null, parent, function () {
        document.execCommand('fontname', false, fontname);
      });
      tr.firstChild.nextSibling.style.fontFamily = fontname;
    });

    for (var i = 0; i < this.defaultFonts.length; i++) {
      addItem(this.defaultFonts[i]);
    }

    menu.addSeparator(parent);

    if (this.customFonts.length > 0) {
      for (var i = 0; i < this.customFonts.length; i++) {
        addItem(this.customFonts[i]);
      }

      menu.addSeparator(parent);

      menu.addItem(mxResources.get('reset'), null, mxUtils.bind(this, function () {
        this.customFonts = [];
      }), parent);

      menu.addSeparator(parent);
    }

    this.promptChange(menu, mxResources.get('custom') + '...', '', mxConstants.DEFAULT_FONTFAMILY, mxConstants.STYLE_FONTFAMILY, parent, true, mxUtils.bind(this, function (newValue) {
      this.customFonts.push(newValue);
    }));
  })));
  this.put('formatBlock', new Menu(mxUtils.bind(this, function (menu, parent) {
    function addItem(label, tag) {
      return menu.addItem(label, null, mxUtils.bind(this, function () {
        // TODO: Check if visible
        graph.cellEditor.textarea.focus();
	      		document.execCommand('formatBlock', false, '<' + tag + '>');
      }), parent);
    }

    addItem(mxResources.get('normal'), 'p');

    addItem('', 'h1').firstChild.nextSibling.innerHTML = '<h1 style="margin:0px;">' + mxResources.get('heading') + ' 1</h1>';
    addItem('', 'h2').firstChild.nextSibling.innerHTML = '<h2 style="margin:0px;">' + mxResources.get('heading') + ' 2</h2>';
    addItem('', 'h3').firstChild.nextSibling.innerHTML = '<h3 style="margin:0px;">' + mxResources.get('heading') + ' 3</h3>';
    addItem('', 'h4').firstChild.nextSibling.innerHTML = '<h4 style="margin:0px;">' + mxResources.get('heading') + ' 4</h4>';
    addItem('', 'h5').firstChild.nextSibling.innerHTML = '<h5 style="margin:0px;">' + mxResources.get('heading') + ' 5</h5>';
    addItem('', 'h6').firstChild.nextSibling.innerHTML = '<h6 style="margin:0px;">' + mxResources.get('heading') + ' 6</h6>';

    addItem('', 'pre').firstChild.nextSibling.innerHTML = '<pre style="margin:0px;">' + mxResources.get('formatted') + '</pre>';
    addItem('', 'blockquote').firstChild.nextSibling.innerHTML = '<blockquote style="margin-top:0px;margin-bottom:0px;">' + mxResources.get('blockquote') + '</blockquote>';
  })));
  this.put('fontSize', new Menu(mxUtils.bind(this, function (menu, parent) {
    var sizes = [6, 8, 9, 10, 11, 12, 14, 18, 24, 36, 48, 72];

    var addItem = mxUtils.bind(this, function (fontsize) {
      this.styleChange(menu, fontsize, [mxConstants.STYLE_FONTSIZE], [fontsize], null, parent, function () {
        // Creates an element with arbitrary size 3
        document.execCommand('fontSize', false, '3');

        // Changes the css font size of the first font element inside the in-place editor with size 3
        // hopefully the above element that we've just created. LATER: Check for new element using
        // previous result of getElementsByTagName (see other actions)
        var elts = graph.cellEditor.textarea.getElementsByTagName('font');

        for (var i = 0; i < elts.length; i++) {
          if (elts[i].getAttribute('size') == '3') {
            elts[i].removeAttribute('size');
            elts[i].style.fontSize = fontsize + 'px';

            break;
          }
        }
      });
    });

    for (var i = 0; i < sizes.length; i++) {
      addItem(sizes[i]);
    }

    menu.addSeparator(parent);

    if (this.customFontSizes.length > 0) {
      for (var i = 0; i < this.customFontSizes.length; i++) {
        addItem(this.customFontSizes[i]);
      }

      menu.addSeparator(parent);

      menu.addItem(mxResources.get('reset'), null, mxUtils.bind(this, function () {
        this.customFontSizes = [];
      }), parent);

      menu.addSeparator(parent);
    }

    this.promptChange(menu, mxResources.get('custom') + '...', '(pt)', '12', mxConstants.STYLE_FONTSIZE, parent, true, mxUtils.bind(this, function (newValue) {
      this.customFontSizes.push(newValue);
    }));
  })));
  this.put('direction', new Menu(mxUtils.bind(this, function (menu, parent) {
    menu.addItem(mxResources.get('flipH'), null, function () {
      graph.toggleCellStyles(mxConstants.STYLE_FLIPH, false);
    }, parent);
    menu.addItem(mxResources.get('flipV'), null, function () {
      graph.toggleCellStyles(mxConstants.STYLE_FLIPV, false);
    }, parent);
    this.addMenuItems(menu, ['-', 'rotation'], parent);
  })));
  this.put('align', new Menu(mxUtils.bind(this, function (menu, parent) {
    menu.addItem(mxResources.get('leftAlign'), null, function () {
      graph.alignCells(mxConstants.ALIGN_LEFT);
    }, parent);
    menu.addItem(mxResources.get('center'), null, function () {
      graph.alignCells(mxConstants.ALIGN_CENTER);
    }, parent);
    menu.addItem(mxResources.get('rightAlign'), null, function () {
      graph.alignCells(mxConstants.ALIGN_RIGHT);
    }, parent);
    menu.addSeparator(parent);
    menu.addItem(mxResources.get('topAlign'), null, function () {
      graph.alignCells(mxConstants.ALIGN_TOP);
    }, parent);
    menu.addItem(mxResources.get('middle'), null, function () {
      graph.alignCells(mxConstants.ALIGN_MIDDLE);
    }, parent);
    menu.addItem(mxResources.get('bottomAlign'), null, function () {
      graph.alignCells(mxConstants.ALIGN_BOTTOM);
    }, parent);
  })));
  this.put('distribute', new Menu(mxUtils.bind(this, function (menu, parent) {
    menu.addItem(mxResources.get('horizontal'), null, function () {
      graph.distributeCells(true);
    }, parent);
    menu.addItem(mxResources.get('vertical'), null, function () {
      graph.distributeCells(false);
    }, parent);
  })));
  this.put('layout', new Menu(mxUtils.bind(this, function (menu, parent) {
    var promptSpacing = mxUtils.bind(this, function (defaultValue, fn) {
      var dlg = new FilenameDialog(this.editorUi, defaultValue, mxResources.get('apply'), function (newValue) {
        fn(parseFloat(newValue));
      }, mxResources.get('spacing'));
      this.editorUi.showDialog(dlg.container, 300, 80, true, true);
      dlg.init();
    });

    menu.addItem(mxResources.get('horizontalFlow'), null, mxUtils.bind(this, function () {
      var layout = new mxHierarchicalLayout(graph, mxConstants.DIRECTION_WEST);

    		this.editorUi.executeLayout(function () {
    			var selectionCells = graph.getSelectionCells();
    			layout.execute(graph.getDefaultParent(), selectionCells.length == 0 ? null : selectionCells);
    		}, true);
    }), parent);
    menu.addItem(mxResources.get('verticalFlow'), null, mxUtils.bind(this, function () {
      var layout = new mxHierarchicalLayout(graph, mxConstants.DIRECTION_NORTH);

    		this.editorUi.executeLayout(function () {
    			var selectionCells = graph.getSelectionCells();
    			layout.execute(graph.getDefaultParent(), selectionCells.length == 0 ? null : selectionCells);
    		}, true);
    }), parent);
    menu.addSeparator(parent);
    menu.addItem(mxResources.get('horizontalTree'), null, mxUtils.bind(this, function () {
      var tmp = graph.getSelectionCell();
      var roots = null;

      if (tmp == null || graph.getModel().getChildCount(tmp) == 0) {
        if (graph.getModel().getEdgeCount(tmp) == 0) {
          roots = graph.findTreeRoots(graph.getDefaultParent());
        }
      } else {
        roots = graph.findTreeRoots(tmp);
      }

      if (roots != null && roots.length > 0) {
        tmp = roots[0];
      }

      if (tmp != null) {
        var layout = new mxCompactTreeLayout(graph, true);
        layout.edgeRouting = false;
        layout.levelDistance = 30;

        promptSpacing(layout.levelDistance, mxUtils.bind(this, function (newValue) {
          layout.levelDistance = newValue;

          this.editorUi.executeLayout(function () {
            layout.execute(graph.getDefaultParent(), tmp);
		    		}, true);
        }));
      }
    }), parent);
    menu.addItem(mxResources.get('verticalTree'), null, mxUtils.bind(this, function () {
      var tmp = graph.getSelectionCell();
      var roots = null;

      if (tmp == null || graph.getModel().getChildCount(tmp) == 0) {
        if (graph.getModel().getEdgeCount(tmp) == 0) {
          roots = graph.findTreeRoots(graph.getDefaultParent());
        }
      } else {
        roots = graph.findTreeRoots(tmp);
      }

      if (roots != null && roots.length > 0) {
        tmp = roots[0];
      }

      if (tmp != null) {
        var layout = new mxCompactTreeLayout(graph, false);
        layout.edgeRouting = false;
        layout.levelDistance = 30;

        promptSpacing(layout.levelDistance, mxUtils.bind(this, function (newValue) {
          layout.levelDistance = newValue;

          this.editorUi.executeLayout(function () {
            layout.execute(graph.getDefaultParent(), tmp);
		    		}, true);
        }));
      }
    }), parent);
    menu.addItem(mxResources.get('radialTree'), null, mxUtils.bind(this, function () {
      var tmp = graph.getSelectionCell();
      var roots = null;

      if (tmp == null || graph.getModel().getChildCount(tmp) == 0) {
        if (graph.getModel().getEdgeCount(tmp) == 0) {
          roots = graph.findTreeRoots(graph.getDefaultParent());
        }
      } else {
        roots = graph.findTreeRoots(tmp);
      }

      if (roots != null && roots.length > 0) {
        tmp = roots[0];
      }

      if (tmp != null) {
        var layout = new mxRadialTreeLayout(graph, false);
        layout.levelDistance = 80;
        layout.autoRadius = true;

        promptSpacing(layout.levelDistance, mxUtils.bind(this, function (newValue) {
          layout.levelDistance = newValue;

          this.editorUi.executeLayout(function () {
		    			layout.execute(graph.getDefaultParent(), tmp);

		    			if (!graph.isSelectionEmpty()) {
			    			tmp = graph.getModel().getParent(tmp);

			    			if (graph.getModel().isVertex(tmp)) {
			    				graph.updateGroupBounds([tmp], graph.gridSize * 2, true);
			    			}
		    			}
		    		}, true);
        }));
      }
    }), parent);
    menu.addSeparator(parent);
    menu.addItem(mxResources.get('organic'), null, mxUtils.bind(this, function () {
      var layout = new mxFastOrganicLayout(graph);

      promptSpacing(layout.forceConstant, mxUtils.bind(this, function (newValue) {
        layout.forceConstant = newValue;

	    		this.editorUi.executeLayout(function () {
	    			var tmp = graph.getSelectionCell();

	    			if (tmp == null || graph.getModel().getChildCount(tmp) == 0) {
	    				tmp = graph.getDefaultParent();
	    			}

	    			layout.execute(tmp);

	    			if (graph.getModel().isVertex(tmp)) {
	    				graph.updateGroupBounds([tmp], graph.gridSize * 2, true);
	    			}
	    		}, true);
      }));
    }), parent);
    menu.addItem(mxResources.get('circle'), null, mxUtils.bind(this, function () {
      var layout = new mxCircleLayout(graph);

    		this.editorUi.executeLayout(function () {
    			var tmp = graph.getSelectionCell();

    			if (tmp == null || graph.getModel().getChildCount(tmp) == 0) {
    				tmp = graph.getDefaultParent();
    			}

    			layout.execute(tmp);

    			if (graph.getModel().isVertex(tmp)) {
    				graph.updateGroupBounds([tmp], graph.gridSize * 2, true);
    			}
    		}, true);
    }), parent);
  })));
  this.put('navigation', new Menu(mxUtils.bind(this, function (menu, parent) {
    this.addMenuItems(menu, ['home', '-', 'exitGroup', 'enterGroup', '-', 'expand', 'collapse', '-', 'collapsible'], parent);
  })));
  this.put('arrange', new Menu(mxUtils.bind(this, function (menu, parent) {
    this.addMenuItems(menu, ['toFront', 'toBack', '-'], parent);
    this.addSubmenu('direction', menu, parent);
    this.addMenuItems(menu, ['turn', '-'], parent);
    this.addSubmenu('align', menu, parent);
    this.addSubmenu('distribute', menu, parent);
    menu.addSeparator(parent);
    this.addSubmenu('navigation', menu, parent);
    this.addSubmenu('insert', menu, parent);
    this.addSubmenu('layout', menu, parent);
    this.addMenuItems(menu, ['-', 'group', 'ungroup', 'removeFromGroup', '-', 'clearWaypoints', 'autosize'], parent);
  }))).isEnabled = isGraphEnabled;
  this.put('insert', new Menu(mxUtils.bind(this, function (menu, parent) {
    this.addMenuItems(menu, ['insertLink', 'insertImage'], parent);
  })));
  this.put('view', new Menu(mxUtils.bind(this, function (menu, parent) {
    this.addMenuItems(menu, ((this.editorUi.format != null) ? ['formatPanel'] : [])
      .concat(['outline', 'layers', '-', 'pageView', 'pageScale', '-', 'scrollbars', 'tooltips', '-',
			        'grid', 'guides', '-', 'connectionArrows', 'connectionPoints', '-',
			        'resetView', 'zoomIn', 'zoomOut'], parent));
  })));
  // Two special dropdowns that are only used in the toolbar
  this.put('viewPanels', new Menu(mxUtils.bind(this, function (menu, parent) {
    if (this.editorUi.format != null) {
      this.addMenuItems(menu, ['formatPanel'], parent);
    }

    this.addMenuItems(menu, ['outline', 'layers'], parent);
  })));
  this.put('viewZoom', new Menu(mxUtils.bind(this, function (menu, parent) {
    this.addMenuItems(menu, ['resetView', '-'], parent);
    var scales = [0.25, 0.5, 0.75, 1, 1.25, 1.5, 2, 3, 4];

    for (var i = 0; i < scales.length; i++) {
      (function (scale) {
        menu.addItem((scale * 100) + '%', null, function () {
          graph.zoomTo(scale);
        }, parent);
      }(scales[i]));
    }

    this.addMenuItems(menu, ['-', 'fitWindow', 'fitPageWidth', 'fitPage', 'fitTwoPages', '-', 'customZoom'], parent);
  })));
  this.put('file', new Menu(mxUtils.bind(this, function (menu, parent) {
    this.addMenuItems(menu, ['new', 'open', '-', 'save', 'saveAs', '-', 'import', 'export', '-',
      'generateCode', '-', 'pageSetup', 'print'], parent);
  })));
  this.put('edit', new Menu(mxUtils.bind(this, function (menu, parent) {
    this.addMenuItems(menu, ['undo', 'redo', '-', 'cut', 'copy', 'paste', 'delete', '-', 'duplicate', '-',
		                         'editData', 'editTooltip', 'editStyle', '-', 'edit', '-', 'editLink', 'openLink', '-',
		                         'selectVertices', 'selectEdges', 'selectAll', 'selectNone', '-', 'lockUnlock']);
  })));
  this.put('extras', new Menu(mxUtils.bind(this, function (menu, parent) {
    this.addMenuItems(menu, ['copyConnect', 'collapseExpand', '-', 'editDiagram']);
  })));
  this.put('help', new Menu(mxUtils.bind(this, function (menu, parent) {
    this.addMenuItems(menu, ['help', '-', 'about']);
  })));
};

/**
 * Adds the label menu items to the given menu and parent.
 */
Menus.prototype.put = function (name, menu) {
  this.menus[name] = menu;

  return menu;
};

/**
 * Adds the label menu items to the given menu and parent.
 */
Menus.prototype.get = function (name) {
  return this.menus[name];
};

/**
 * Adds the given submenu.
 */
Menus.prototype.addSubmenu = function (name, menu, parent) {
  var enabled = this.get(name).isEnabled();

  if (menu.showDisabled || enabled) {
    var submenu = menu.addItem(mxResources.get(name), null, null, parent, null, enabled);
    this.addMenu(name, menu, submenu);
  }
};

/**
 * Adds the label menu items to the given menu and parent.
 */
Menus.prototype.addMenu = function (name, popupMenu, parent) {
  var menu = this.get(name);

  if (menu != null && (popupMenu.showDisabled || menu.isEnabled())) {
    this.get(name).execute(popupMenu, parent);
  }
};

/**
 * Adds a menu item to insert a table.
 */
Menus.prototype.addInsertTableItem = function (menu) {
  // KNOWN: Does not work in IE8 standards and quirks
  var graph = this.editorUi.editor.graph;

  function createTable(rows, cols) {
    var html = ['<table>'];

    for (var i = 0; i < rows; i++) {
      html.push('<tr>');

      for (var j = 0; j < cols; j++) {
        html.push('<td><br></td>');
      }

      html.push('</tr>');
    }

    html.push('</table>');

    return html.join('');
  }

  // Show table size dialog
  var elt2 = menu.addItem('', null, mxUtils.bind(this, function (evt) {
    var td = graph.getParentByName(mxEvent.getSource(evt), 'TD');

    if (td != null) {
      var row2 = graph.getParentByName(td, 'TR');

      // To find the new link, we create a list of all existing links first
    		// LATER: Refactor for reuse with code for finding inserted image below
      var tmp = graph.cellEditor.textarea.getElementsByTagName('table');
      var oldTables = [];

      for (var i = 0; i < tmp.length; i++) {
        oldTables.push(tmp[i]);
      }

      // Finding the new table will work with insertHTML, but IE does not support that
      graph.container.focus();
      graph.pasteHtmlAtCaret(createTable(row2.sectionRowIndex + 1, td.cellIndex + 1));

      // Moves cursor to first table cell
      var newTables = graph.cellEditor.textarea.getElementsByTagName('table');

      if (newTables.length == oldTables.length + 1) {
        // Inverse order in favor of appended tables
        for (var i = newTables.length - 1; i >= 0; i--) {
          if (i == 0 || newTables[i] != oldTables[i - 1]) {
            graph.selectNode(newTables[i].rows[0].cells[0]);
            break;
          }
        }
      }
    }
  }));

  // Quirks mode does not add cell padding if cell is empty, needs good old spacer solution
  var quirksCellHtml = '<img src="' + mxClient.imageBasePath + '/transparent.gif' + '" width="16" height="16"/>';

  function createPicker(rows, cols) {
    var table2 = document.createElement('table');
    table2.setAttribute('border', '1');
    table2.style.borderCollapse = 'collapse';

    if (!mxClient.IS_QUIRKS) {
      table2.setAttribute('cellPadding', '8');
    }

    for (var i = 0; i < rows; i++) {
      var row = table2.insertRow(i);

      for (var j = 0; j < cols; j++) {
        var cell = row.insertCell(-1);

        if (mxClient.IS_QUIRKS) {
          cell.innerHTML = quirksCellHtml;
        }
      }
    }

    return table2;
  }

  function extendPicker(picker, rows, cols) {
    for (var i = picker.rows.length; i < rows; i++) {
      var row = picker.insertRow(i);

      for (var j = 0; j < picker.rows[0].cells.length; j++) {
        var cell = row.insertCell(-1);

        if (mxClient.IS_QUIRKS) {
          cell.innerHTML = quirksCellHtml;
        }
      }
    }

    for (var i = 0; i < picker.rows.length; i++) {
      var row = picker.rows[i];

      for (var j = row.cells.length; j < cols; j++) {
        var cell = row.insertCell(-1);

        if (mxClient.IS_QUIRKS) {
          cell.innerHTML = quirksCellHtml;
        }
      }
    }
  }

  elt2.firstChild.innerHTML = '';
  var picker = createPicker(5, 5);
  elt2.firstChild.appendChild(picker);

  var label = document.createElement('div');
  label.style.padding = '4px';
  label.style.fontSize = Menus.prototype.defaultFontSize + 'px';
  label.innerHTML = '1x1';
  elt2.firstChild.appendChild(label);

  mxEvent.addListener(picker, 'mouseover', function (e) {
    var td = graph.getParentByName(mxEvent.getSource(e), 'TD');

    if (td != null) {
      var row2 = graph.getParentByName(td, 'TR');
      extendPicker(picker, Math.min(20, row2.sectionRowIndex + 2), Math.min(20, td.cellIndex + 2));
      label.innerHTML = (td.cellIndex + 1) + 'x' + (row2.sectionRowIndex + 1);

      for (var i = 0; i < picker.rows.length; i++) {
        var r = picker.rows[i];

        for (var j = 0; j < r.cells.length; j++) {
          var cell = r.cells[j];

          if (i <= row2.sectionRowIndex && j <= td.cellIndex) {
            cell.style.backgroundColor = 'blue';
          } else {
            cell.style.backgroundColor = 'white';
          }
        }
      }

      mxEvent.consume(e);
    }
  });
};

/**
 * Adds a style change item to the given menu.
 */
Menus.prototype.edgeStyleChange = function (menu, label, keys, values, sprite, parent, reset) {
  return menu.addItem(label, null, mxUtils.bind(this, function () {
    var graph = this.editorUi.editor.graph;
    graph.stopEditing(false);

    graph.getModel().beginUpdate();
    try {
      var cells = graph.getSelectionCells();
      var edges = [];

      for (var i = 0; i < cells.length; i++) {
        var cell = cells[i];

        if (graph.getModel().isEdge(cell)) {
          if (reset) {
            var geo = graph.getCellGeometry(cell);

            // Resets all edge points
            if (geo != null) {
              geo = geo.clone();
              geo.points = null;
              graph.getModel().setGeometry(cell, geo);
            }
          }

          for (var j = 0; j < keys.length; j++) {
            graph.setCellStyles(keys[j], values[j], [cell]);
          }

          edges.push(cell);
        }
      }

      this.editorUi.fireEvent(new mxEventObject(
        'styleChanged', 'keys', keys,
        'values', values, 'cells', edges
      ));
    } finally {
      graph.getModel().endUpdate();
    }
  }), parent, sprite);
};

/**
 * Adds a style change item to the given menu.
 */
Menus.prototype.styleChange = function (menu, label, keys, values, sprite, parent, fn) {
  var apply = this.createStyleChangeFunction(keys, values);

  return menu.addItem(label, null, mxUtils.bind(this, function () {
    var graph = this.editorUi.editor.graph;

    if (fn != null && graph.cellEditor.isContentEditing()) {
      fn();
    } else {
      apply();
    }
  }), parent, sprite);
};

/**
 *
 */
Menus.prototype.createStyleChangeFunction = function (keys, values) {
  return mxUtils.bind(this, function () {
    var graph = this.editorUi.editor.graph;
    graph.stopEditing(false);

    graph.getModel().beginUpdate();
    try {
      for (var i = 0; i < keys.length; i++) {
        graph.setCellStyles(keys[i], values[i]);
      }

      this.editorUi.fireEvent(new mxEventObject(
        'styleChanged', 'keys', keys, 'values', values,
        'cells', graph.getSelectionCells()
      ));
    } finally {
      graph.getModel().endUpdate();
    }
  });
};

/**
 * Adds a style change item with a prompt to the given menu.
 */
Menus.prototype.promptChange = function (menu, label, hint, defaultValue, key, parent, enabled, fn, sprite) {
  return menu.addItem(label, null, mxUtils.bind(this, function () {
    var graph = this.editorUi.editor.graph;
    var value = defaultValue;
    	var state = graph.getView().getState(graph.getSelectionCell());

    	if (state != null) {
    		value = state.style[key] || value;
    	}

    var dlg = new FilenameDialog(this.editorUi, value, mxResources.get('apply'), mxUtils.bind(this, function (newValue) {
      if (newValue != null && newValue.length > 0) {
        graph.getModel().beginUpdate();
        try {
          graph.stopEditing(false);
          graph.setCellStyles(key, newValue);
        } finally {
          graph.getModel().endUpdate();
        }

        if (fn != null) {
          fn(newValue);
        }
      }
    }), mxResources.get('enterValue') + ((hint.length > 0) ? (' ' + hint) : ''));
    this.editorUi.showDialog(dlg.container, 300, 80, true, true);
    dlg.init();
  }), parent, sprite, enabled);
};

/**
 * Adds a handler for showing a menu in the given element.
 */
Menus.prototype.pickColor = function (key, cmd, defaultValue) {
  var graph = this.editorUi.editor.graph;

  if (cmd != null && graph.cellEditor.isContentEditing()) {
    // Saves and restores text selection for in-place editor
    var selState = graph.cellEditor.saveSelection();

    var dlg = new ColorDialog(this.editorUi, defaultValue || '000000', mxUtils.bind(this, function (color) {
      graph.cellEditor.restoreSelection(selState);
      document.execCommand(cmd, false, (color != mxConstants.NONE) ? color : 'transparent');
    }), function () {
      graph.cellEditor.restoreSelection(selState);
    });
    this.editorUi.showDialog(dlg.container, 220, 430, true, true);
    dlg.init();
  } else {
    if (this.colorDialog == null) {
      this.colorDialog = new ColorDialog(this.editorUi);
    }

    this.colorDialog.currentColorKey = key;
    var state = graph.getView().getState(graph.getSelectionCell());
    var color = 'none';

    if (state != null) {
      color = state.style[key] || color;
    }

    if (color == 'none') {
      color = 'ffffff';
      this.colorDialog.picker.fromString('ffffff');
      this.colorDialog.colorInput.value = 'none';
    } else {
      this.colorDialog.picker.fromString(color);
    }

    this.editorUi.showDialog(this.colorDialog.container, 220, 430, true, true);
    this.colorDialog.init();
  }
};

/**
 * Adds a handler for showing a menu in the given element.
 */
Menus.prototype.toggleStyle = function (key, defaultValue) {
  var graph = this.editorUi.editor.graph;
  var value = graph.toggleCellStyles(key, defaultValue);
  this.editorUi.fireEvent(new mxEventObject(
    'styleChanged', 'keys', [key], 'values', [value],
    'cells', graph.getSelectionCells()
  ));
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
Menus.prototype.addMenuItem = function (menu, key, parent, trigger, sprite) {
  var action = this.editorUi.actions.get(key);

  if (action != null && (menu.showDisabled || action.isEnabled()) && action.visible) {
    var item = menu.addItem(action.label, null, function () {
      action.funct(trigger);
    }, parent, sprite, action.isEnabled());

    // Adds checkmark image
    if (action.toggleAction && action.isSelected()) {
      menu.addCheckmark(item, Editor.checkmarkImage);
    }

    this.addShortcut(item, action);

    return item;
  }

  return null;
};

/**
 * Adds a checkmark to the given menuitem.
 */
Menus.prototype.addShortcut = function (item, action) {
  if (action.shortcut != null) {
    var td = item.firstChild.nextSibling.nextSibling;
    var span = document.createElement('span');
    span.style.color = 'gray';
    mxUtils.write(span, action.shortcut);
    td.appendChild(span);
  }
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
Menus.prototype.addMenuItems = function (menu, keys, parent, trigger, sprites) {
  for (var i = 0; i < keys.length; i++) {
    if (keys[i] == '-') {
      menu.addSeparator(parent);
    } else {
      this.addMenuItem(menu, keys[i], parent, trigger, (sprites != null) ? sprites[i] : null);
    }
  }
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
Menus.prototype.createPopupMenu = function (menu, cell, evt) {
  var graph = this.editorUi.editor.graph;
  menu.smartSeparators = true;

  if (graph.isSelectionEmpty()) {
    this.addMenuItems(menu, ['undo', 'redo', '-', 'pasteHere'], null, evt);
  } else {
    this.addMenuItems(menu, ['delete', '-', 'cut', 'copy', '-', 'duplicate'], null, evt);

  }

  if (graph.getSelectionCount() > 0) {
    if (graph.getSelectionCount() == 1) {
      this.addMenuItems(menu, ['setAsDefaultStyle'], null, evt);
    }

    menu.addSeparator();

    cell = graph.getSelectionCell();
    var state = graph.view.getState(cell);

    if (state != null) {
      if (graph.getSelectionCount() == 1) {
        this.addMenuItems(menu, ['toFront', 'toBack', '-'], null, evt);
      }

      if (graph.getModel().isEdge(cell) && mxUtils.getValue(state.style, mxConstants.STYLE_EDGE, null) != 'entityRelationEdgeStyle' &&
				mxUtils.getValue(state.style, mxConstants.STYLE_SHAPE, null) != 'arrow') {
        var handler = graph.selectionCellsHandler.getHandler(cell);
        var isWaypoint = false;

        if (handler instanceof mxEdgeHandler && handler.bends != null && handler.bends.length > 2) {
          var index = handler.getHandleForEvent(graph.updateMouseEvent(new mxMouseEvent(evt)));

          // Configures removeWaypoint action before execution
          // Using trigger parameter is cleaner but have to find waypoint here anyway.
          var rmWaypointAction = this.editorUi.actions.get('removeWaypoint');
          rmWaypointAction.handler = handler;
          rmWaypointAction.index = index;

          isWaypoint = index > 0 && index < handler.bends.length - 1;
        }

        this.addMenuItems(menu, ['-', (isWaypoint) ? 'removeWaypoint' : 'addWaypoint'], null, evt);

        // Adds reset waypoints option if waypoints exist
        var geo = graph.getModel().getGeometry(cell);

        if (geo != null && geo.points != null && geo.points.length > 0) {
          this.addMenuItems(menu, ['clearWaypoints'], null, evt);
        }
      }

      if (graph.getSelectionCount() > 1) {
        menu.addSeparator();
        this.addMenuItems(menu, ['group'], null, evt);
      } else if (graph.getSelectionCount() == 1 && !graph.getModel().isEdge(cell) && !graph.isSwimlane(cell) &&
					graph.getModel().getChildCount(cell) > 0) {
        menu.addSeparator();
        this.addMenuItems(menu, ['ungroup'], null, evt);
      }

      if (graph.getSelectionCount() == 1) {
        menu.addSeparator();
        this.addMenuItems(menu, ['edit', '-', 'editData', 'editLink'], null, evt);

        // Shows edit image action if there is an image in the style
        if (graph.getModel().isVertex(cell) && mxUtils.getValue(state.style, mxConstants.STYLE_IMAGE, null) != null) {
          menu.addSeparator();
          this.addMenuItem(menu, 'image', null, evt).firstChild.nextSibling.innerHTML = mxResources.get('editImage') + '...';
        }
      }
    }
  } else {
    this.addMenuItems(menu, ['-', 'selectVertices', 'selectEdges', '-', 'selectAll'], null, evt);
  }
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
Menus.prototype.createMenubar = function (container) {
  var menubar = new Menubar(this.editorUi, container);
  var menus = this.defaultMenuItems;

  for (var i = 0; i < menus.length; i++) {
    (mxUtils.bind(this, function (menu) {
      var elt = menubar.addMenu(mxResources.get(menus[i]), mxUtils.bind(this, function () {
        // Allows extensions of menu.funct
        menu.funct.apply(this, arguments);
      }));

      if (elt != null) {
        menu.addListener('stateChanged', function () {
          elt.enabled = menu.enabled;

          if (!menu.enabled) {
            elt.className = 'geItem mxDisabled';

            if (document.documentMode == 8) {
              elt.style.color = '#c3c3c3';
            }
          } else {
            elt.className = 'geItem';

            if (document.documentMode == 8) {
              elt.style.color = '';
            }
          }
        });
      }
    }))(this.get(menus[i]));
  }

  return menubar;
};

/**
 * Construcs a new menubar for the given editor.
 */
function Menubar(editorUi, container) {
  this.editorUi = editorUi;
  this.container = container;
}

/**
 * Adds the menubar elements.
 */
Menubar.prototype.hideMenu = function () {
  this.editorUi.hideCurrentMenu();
};

/**
 * Adds a submenu to this menubar.
 */
Menubar.prototype.addMenu = function (label, funct) {
  var elt = document.createElement('a');
  elt.setAttribute('href', 'javascript:void(0);');
  elt.className = 'geItem';
  mxUtils.write(elt, label);

  this.addMenuHandler(elt, funct);
  this.container.appendChild(elt);

  return elt;
};

/**
 * Adds a handler for showing a menu in the given element.
 */
Menubar.prototype.addMenuHandler = function (elt, funct) {
  if (funct != null) {
    var show = true;

    var clickHandler = mxUtils.bind(this, function (evt) {
      if (show && elt.enabled == null || elt.enabled) {
        this.editorUi.editor.graph.popupMenuHandler.hideMenu();
        var menu = new mxPopupMenu(funct);
        menu.div.className += ' geMenubarMenu';
        menu.smartSeparators = true;
        menu.showDisabled = true;
        menu.autoExpand = true;

        // Disables autoexpand and destroys menu when hidden
        menu.hideMenu = mxUtils.bind(this, function () {
          mxPopupMenu.prototype.hideMenu.apply(menu, arguments);
          this.editorUi.resetCurrentMenu();
          menu.destroy();
        });

        var offset = mxUtils.getOffset(elt);
        menu.popup(offset.x, offset.y + elt.offsetHeight, null, evt);
        this.editorUi.setCurrentMenu(menu, elt);
      }

      mxEvent.consume(evt);
    });

    // Shows menu automatically while in expanded state
    mxEvent.addListener(elt, 'mousemove', mxUtils.bind(this, function (evt) {
      if (this.editorUi.currentMenu != null && this.editorUi.currentMenuElt != elt) {
        this.editorUi.hideCurrentMenu();
        clickHandler(evt);
      }
    }));

    // Hides menu if already showing
    mxEvent.addListener(elt, 'mousedown', mxUtils.bind(this, function () {
      show = this.currentElt != elt;
    }));

    mxEvent.addListener(elt, 'click', mxUtils.bind(this, function (evt) {
      clickHandler(evt);
      show = true;
    }));
  }
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
Menubar.prototype.destroy = function () {
  // do nothing
};

/**
 * Constructs a new action for the given parameters.
 */
function Menu(funct, enabled) {
  mxEventSource.call(this);
  this.funct = funct;
  this.enabled = (enabled != null) ? enabled : true;
}

// Menu inherits from mxEventSource
mxUtils.extend(Menu, mxEventSource);

/**
 * Sets the enabled state of the action and fires a stateChanged event.
 */
Menu.prototype.isEnabled = function () {
  return this.enabled;
};

/**
 * Sets the enabled state of the action and fires a stateChanged event.
 */
Menu.prototype.setEnabled = function (value) {
  if (this.enabled != value) {
    this.enabled = value;
    this.fireEvent(new mxEventObject('stateChanged'));
  }
};

/**
 * Sets the enabled state of the action and fires a stateChanged event.
 */
Menu.prototype.execute = function (menu, parent) {
  this.funct(menu, parent);
};

module.exports = Menus;